Hello @ELI HONIG
Please find below VMware article which relates to certificate renewal for vCenter Server 6.x version. It can help you out in some extent.
Note: Take a snapshot or a backup of the vCenter before proceeding. (The same mentioned in an article too)
https://knowledge.broadcom.com/external/article/318767
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Original Message:
Sent: Apr 05, 2026 08:55 AM
From: ELI HONIG
Subject: Vcenter 6.5 expired SSO server certificate & 503 Error
We Have expired certs on this vcenter 6.5 (we expect to upgrade soon) and we were able to recreate all certs except the SSO Server cert. Used vcert 6.0 to update; The SSO cert fails on creating a backup during the renewal process; all roads point to an expired cert; have tried all the vcert options, as well as disabling the vmware update manager prior to the cert update, & lsdoctor which identifies trust mismatch. When I try the option to repair it does not authenticate the administrator@vsphere.local" rel="noopener nofollow ugc" target="_blank">administrator@vsphere.local account with correct credential, and I read that the reason could be an expired cert. Kind of a vicious circle as all articles point back to updating the cert, looking for advice on updating this sso cert. We have root access and used administrator@vsphere.local" rel="noopener nofollow ugc" target="_blank">administrator@vsphere.local authentication to recreate each cert. This is a two host network. Any input will help! Thanks
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